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In the owners / instruction manual HONDA states that the Silverwing needs engine oil that meets up to JASO MA standards.

One element of the JASO-MA standard is a friction test designed to determine suitability for wet clutch usage. Since the Silverwing does NOT have a wet clutch, what is the point of using this 'MA' grade oil?

And what I really son't understand is why HONDA excludes 'energy conserving oils'.

That's a very interesting point made about not needing the wet clutch oil spec. It never occured to me as i always buy oil specified for motorcycles. Most car oils 10/40s semi-synthetic are about half the price of the oil i've been buying. Cheers for that chaps.